Clarification of June 21, 2026 Economic Daily News Report

Original: 說明115年6月21日經濟日報報導

Summary

The company issued a clarification regarding a June 21, 2026 report in the Economic Daily News (經濟日報). Such disclosures are typically filed in response to media speculation about operations, orders, or corporate actions, and the content can range from routine denial to confirmation of material information. Full body available on MOPS.

Historical Impact

10 past Material Information · ≈ 8-K events at UMC

Median +5d

-0.88%

Range

-5.75% to +25.18%

Positive outcomes

4/10

Filed	P₀	P₊₅	+5d
Jun 29, 2026	NT$164	NT$166	+1.22%
Jun 23, 2026	NT$170	NT$169	-0.88%

Full Translation

Clarification regarding the news report carried by the Economic Daily News on June 21, 2026 (ROC year 115). Taiwan-listed companies are required to publicly respond to media reports that may materially affect their stock price or contain information not yet disclosed by the company. The substantive content — whether the company is confirming, denying, or supplementing the reported information — is contained in the full filing body. [Body not available — subject line only. See MOPS for full announcement.]